识别出错

1.1 $\frac{1}{2}$ 2 $\frac{1}{2}$
$\frac{1}{12}$ $3\frac{3}{5}$ 1 $\frac{1}{2}$
$\frac{1}{5}$ $\frac{1}{3}$ $\frac{5}{6}$ $\frac{2}{15}$
$\frac{17}{46}$ $\frac{7}{22}$ $\frac{7}{36}$ 0
$\frac{7}{9}$ $\frac{7}{18}$ $5\frac{8}{9}$ 27

2.计算下面各题,能简算的要简算。(每题3★)
$\frac{9}{4} - (\frac{1}{4} + \frac{2}{5})$
$\frac{17}{13} + \frac{7}{15} + \frac{9}{13} + \frac{8}{15}$
$\frac{3}{4} + \frac{5}{9} + \frac{1}{6} - \frac{5}{9}$
$\frac{14}{3} - \frac{5}{12} - \frac{7}{12}$
$\frac{5}{6} + \frac{7}{9} - \frac{1}{18}$
$5.16 + \frac{15}{11} + 4.84 - \frac{4}{11}$
$\frac{13}{9} - (\frac{4}{9} + \frac{8}{17})$
$\frac{5}{7} - (\frac{5}{9} - \frac{2}{7})$
$0.75 - \frac{4}{15} + \frac{5}{4} - \frac{11}{15}$

2.$1\frac{3}{5}$ 3 $\frac{11}{12}$
$3\frac{2}{3}$ $\frac{14}{9}$ 11
$\frac{9}{17}$ $\frac{4}{9}$ 1